Please answeer this questions ...
What's the engine code ?
What's the ECU code ?
What's the specs of your turbo ?
Do you have a tunning device ?
Have you done something else to the engine or to anything else in the car ? (related with the turbo proyect )
How much whp ( wheel horse power ) you are planning to have at the end of the proyect ?
We all can help but we need certain information that it's necesary to understand where you are standing. you can keep your stock fuel pump a little while but at some point you will need to replace it depending of the whp you want.